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Thill Coupling. H n

Patented July 28,1868.

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CLARK ROBINSON, F OX LAKE,- WISCONSIN.

Letters Patent No. 80,310, detect July 28, 1868.

IMPROVEME T IN 'THILL-GOUPLING.

TO ALL WHOM IT MAY CONCERN Be it known that I, CLARK Ronmson, of FoxLake, in the county of Dodge, in the State of Wisconsin, have inventedan Improved Thill couplingyand I do hereby declare that the following isa. full and exact description thereof,'reference being had to theaccompanying-drawings, and to the letters of reference marked thereon,making a part of this specification, in which- Figure 1 is a centralsectional elevation of my invention.

Figure 2, -a perspective representation of that part of the couplingwhich is attached to the thill, removed from the socket. p

This invention relates to an improvement in that class of couplingswhich are designed to hold the thills firmly' in position when in use,and to permit them to be readilyremoved whendesired; and its natureconsists in the use of a socket-joint, the pivot of which has a notch inits periphery that permits the coupling to be detached when the thillsare raised up, and a stop pivoted to the strap of the coupling, and usedto hold it in place when in use. i i

To enable othersskilled in the art to fully comprehend the constructionof my invention, I have marked corresponding parts with similar letters,and will now give a detailed description. I

D D represent a metal socket, having parallel sides, C, for holding apivot, K, in place, an opening between the letters I L, for removingthepivbt, and a. plate, G, through which the clip B passes, and holdsthe coupling to the axle F. This socket should be made of malleable castiron, and with a recess of suitable size at the back part to receive therubber H, which holds the pivot K closely against the front of thesocket when the joint becomes worn. The pivot K has a circular form, andfills the socket'D, in which it turns, and it has a notch, M, near thefront and lower part of its periphery, which permits the coupling to bedetached when the corner, J, is raised up to the pointI of the socket D."The strap A is cast solid with the pivot K, and should be of suitableWidth to be fastened to a thill, in the usual manner. A stop, E, ispivoted to the strap A, and is used to prevent the coupling from beingdetached, the' end of the stop striking against the point L, andpreventing the point J from moving up to the point I. When the joint isto be detached, the stopE can be turned, as seen at fig. 2.

The device, as shown, provides a very safe, cheap and convenientcoupling, and one which can be made by all ordinary persons whosebusiness it is to work malleable iron, 4

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is

- The socket D D, in combination with the pivot K, having a notch, M,the strap A, and stop E, substantially as set forthand shown. v

CLARK ROBINSON.

Witnesses:

G; L. Gunrm, A. HAYWARIS,

